From: KONRAD Frederic <fred.kon...@greensocs.com> This is a fixed clock device. It justs behave as an empty device with a parametrable output rate.
Signed-off-by: KONRAD Frederic <fred.kon...@greensocs.com> --- hw/misc/Makefile.objs | 1 + hw/misc/fixed-clock.c | 88 +++++++++++++++++++++++++++++++++++++++++++ include/hw/misc/fixed-clock.h | 30 +++++++++++++++ 3 files changed, 119 insertions(+) create mode 100644 hw/misc/fixed-clock.c create mode 100644 include/hw/misc/fixed-clock.h diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs index 1a89615..2670c2d 100644 --- a/hw/misc/Makefile.objs +++ b/hw/misc/Makefile.objs @@ -53,3 +53,4 @@ obj-$(CONFIG_EDU) += edu.o obj-$(CONFIG_HYPERV_TESTDEV) += hyperv_testdev.o obj-$(CONFIG_AUX) += auxbus.o obj-$(CONFIG_ASPEED_SOC) += aspeed_scu.o aspeed_sdmc.o +obj-y += fixed-clock.o diff --git a/hw/misc/fixed-clock.c b/hw/misc/fixed-clock.c new file mode 100644 index 0000000..aa124d8 --- /dev/null +++ b/hw/misc/fixed-clock.c @@ -0,0 +1,88 @@ +/* + * Fixed clock + * + * Copyright (C) 2016 : GreenSocs Ltd + * http://www.greensocs.com/ , email: i...@greensocs.com + * + * Frederic Konrad <fred.kon...@greensocs.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ + +#include "qemu/osdep.h" +#include "hw/qdev.h" +#include "hw/misc/fixed-clock.h" +#include "qemu/qemu-clock.h" +#include "qapi/error.h" + +#ifndef DEBUG_FIXED_CLOCK +#define DEBUG_FIXED_CLOCK 0 +#endif + +#define DPRINTF(fmt, ...) do { \ + if (DEBUG_FIXED_CLOCK) { \ + qemu_log(__FILE__": " fmt , ## __VA_ARGS__); \ + } \ +} while (0); + +typedef struct { + DeviceState parent_obj; + + uint32_t rate; + struct qemu_clk out; +} FixedClock; + +static Property fixed_clock_properties[] = { + DEFINE_PROP_UINT32("rate", FixedClock, rate, 0), + DEFINE_PROP_END_OF_LIST() +}; + +static void fixed_clock_realizefn(DeviceState *dev, Error **errp) +{ + FixedClock *s = FIXED_CLOCK(dev); + + qemu_clk_update_rate(&s->out, s->rate); +} + +static void fixed_clock_instance_init(Object *obj) +{ + FixedClock *s = FIXED_CLOCK(obj); + + object_initialize(&s->out, sizeof(s->out), TYPE_CLOCK); + qemu_clk_device_add_clock(DEVICE(obj), &s->out, "clk_out"); +} + +static void fixed_clock_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = fixed_clock_realizefn; + dc->props = fixed_clock_properties; +} + +static const TypeInfo fixed_clock_info = { + .name = TYPE_FIXED_CLOCK, + .parent = TYPE_DEVICE, + .instance_size = sizeof(FixedClock), + .instance_init = fixed_clock_instance_init, + .class_init = fixed_clock_class_init, +}; + +static void fixed_clock_register_types(void) +{ + type_register_static(&fixed_clock_info); +} + +type_init(fixed_clock_register_types); diff --git a/include/hw/misc/fixed-clock.h b/include/hw/misc/fixed-clock.h new file mode 100644 index 0000000..1376444 --- /dev/null +++ b/include/hw/misc/fixed-clock.h @@ -0,0 +1,30 @@ +/* + * Fixed clock + * + * Copyright (C) 2016 : GreenSocs Ltd + * http://www.greensocs.com/ , email: i...@greensocs.com + * + * Frederic Konrad <fred.kon...@greensocs.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ + +#ifndef FIXED_CLOCK_H +#define FIXED_CLOCK_H + +#define TYPE_FIXED_CLOCK "fixed-clock" +#define FIXED_CLOCK(obj) OBJECT_CHECK(FixedClock, (obj), TYPE_FIXED_CLOCK) + +#endif /* FIXED_CLOCK_H */ -- 1.8.3.1
